Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Development and Oxidation Resistance of B-doped Silicide Coatings on Nb-based Alloy

  • Li, Xiaoxia (School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics) ;
  • Zhou, Chungen (School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics)
  • Published : 2008.08.01
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Abstract

Halide-activated pack cementation was utilized to deposit B-doped silicide coating. The pack powders were consisted of $3Wt.c/oNH_4Cl$, 7Wt.c/oSi, $90Wt.c/oAl_2O_3+TiB_2$. B-doped silicide coating was consisted of two layers, an outer layer of $NbSi_2$ and an inner layer of $Nb_5Si_3$. Isothermal oxidation resistance of B-doped silicide coating was tested at $1250^{\circ}C$ in static air. B-doped silicide coating had excellent oxidation resistance, because continuous $SiO_2$ scale which serves as obstacle of oxygen diffusion was formed after oxidation.

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References

  1. R. A. Perkins and G. H. Meier, J. Mater., 42, 17 (1990)
  2. P. J. Bania, J. Mater., 46, 16 (1994)
  3. L. Gauer, S. Alperine, P. Steinmetz, and A. Vassel, Oxid. Met., 42, 49 (1994)
  4. B. V. Cockeram, Surf. Coat. Technol., 76, 20 (1995) https://doi.org/10.1016/0257-8972(95)02492-1
  5. M. Vilasi, M. Francois, R. Podor, and J. Steinmetz, J. Alloys Comp., 264, 244 (1998) https://doi.org/10.1016/S0925-8388(97)00234-X
  6. J. F. Stringer, High Temperature Corrosion of Aerospace Alloys, AGARD-AG 200, NATO (1975)
  7. C. M. Packer in T. Grobstein, J. Doychak, editors. Oxidation of high temperature intermetallics. p. 235, Warrendale (1988)
  8. B. P. Bewlay, M. R. Jackson, and H. A. Lipsitt, Metall Trans A, 27A, 3801 (1996)
  9. M. Vilasi, M. Francois, R. Podor, and J. Steinmetz, J. Alloys Comp, 264, 244 (1998) https://doi.org/10.1016/S0925-8388(97)00234-X
  10. A. Mueller, G. Wang, R. A. Rapp, and E. L. Courtright, J. Electrochem Soc., 139, 1266 (1992) https://doi.org/10.1149/1.2069395
  11. S. J. Balsone, B. P. Bewlay, M. R. Jackson, P. R. Subramanian, J. C. Zhao, A. Chatterjee, T. M. Heffernan, in K. J. Hemker, et al., editors. Structural intermetallics., p. 99, Warrendale (2001)
  12. S. Priceman and L. Sama, Electrochem. Tech., 6(9-10) 315 (1968)
  13. Yi-Rong He, R. A. Rapp, and P. F. Tortorelli, Mater. Sci. Eng., A222, 109 (1997)
  14. P. G. Cappelli, Coating Processes, in D. Coutsouradis, P. Felix, H. Fischmeister, L. Habraken, Y. Lindblom and M. O. Speidel (eds.), High Temperature Alloys for Gas Turbines, p. 177, Applied Science, London, 1978
  15. W. D. Kingery, H. K. Bowen, and D. R. Uhlmann, Introduction to Ceramics, pp. 92, 257, Wiler, New York, 1975
  16. H. Scholze, Glass Nature, Structure, & properties, pp. 162, 197, 340, Springer, New York, 1990
  17. Y. S. Touloukian, R. K. Kirby, R. E. Taylor, and T. Y. R. Lee, Thermophysical Properties of Matter, Vol. 13, p. 1354, IFI-Plenum, New York, 1977